Physical characteristicsRiver mouthPotomac River 0 feet (0 m)Length4.2 miles (6.8 km)The Port Tobacco River is a tidal tributary of the Potomac River located in Charles County, Maryland in the United States. The river is approximately 4.2 miles (6.8 km) in length. Port Tobacco, the county seat of Charles County from 1658 to 1895, was an active port until that portion of the river became silted and unnavigable. When the railroad bypassed the town, business declined, and the county seat was moved to La Plata, Maryland.
People will soon have the opportunity to explore the Port Tobacco River virtually thanks to a panoramic mapping project organized by the Port Tobacco River Conservancy and the Charles County Department of Recreation, Parks and Tourism.